New York – Oil prices slumped and stocks mostly rose Monday after US President Donald Trump insisted negotiations with Iran were ongoing despite Tehran’s denials. The pullback in oil prices translated into a buoyant session in Wall Street, with all three major US indices in positive territory the entire day. The Dow rose 1.3 percent to an all-time high, while the other two major indices were also firmly higher. While tech stocks were still under pressure in Asia on concerns of over-investment, European bourses cheered the pullback in oil prices. Oil companies, which figure prominently in London’s indices, followed oil prices lower.